It is intended to undertake several related investigations into processes of high energy atomic physics, including their extension toward lower energies. This involves studying the interactions of photons and electrons with correlated atomic structures, including circumstances in which there are several interacting continuum particles in the final state. These studies can yield understanding of the role of relativistic, retardation and higher multipole effects in regimes where they become comparable to or dominate the many electron correlation effects, and it can lead to an identification of the nature of the correlation effects which persist at high energies. Specific studies include: examining high energy behaviors of atomic processes, the extent to which these behaviors follow from the singularities of photon and electron interactions, and the extent to which they depend on correlations; understanding other global features of processes, such as analyticity, also the trajectories of zeroes which serve as a surrogate for structural information; clarifying the relations and transitions between classical and quantum behavior; and studying the relationships among observables, partitioning, and entanglement. Other projects include considerations of deficiencies in the description of basic processes, such as Delbruck scattering and bremsstrahlung, and characterization of atomic processes (such as photoionization, Rayleigh and Compton scattering and bremsstrahlung) and the independent atomic information they contain.
